Cardiovascular System Worksheet

Which component of blood is primarily responsible for oxygen transport?

• Red Blood Cells (Erythrocytes)

• White Blood Cells (Leukocytes)

• Platelets (Thrombocytes)

• Plasma

A patient’s EKG shows an abnormal QRS complex. Based on your understanding, what might this suggest about the patient’s heart function?

• There may be a problem with ventricular depolarization

• The atria are not repolarizing properly

• The heart is not pumping enough blood

• The lungs are not oxygenating blood efficiently

Which of the following is true about veins?

• They handle high pressure

• They contain valves

• They have thick, elastic walls

• They are single cell thick

Which of the following are the first vessels to receive oxygenated blood from the heart?

• Pulmonary veins

• Coronary arteries

• Jugular veins

• Renal arteries

Which structure in the heart is responsible for initiating the electrical impulse that triggers a heartbeat?

• Sinoatrial (SA) node

• Bundle of His

• Purkinje fibers

• Left ventricle

What is the primary function of the coronary arteries?

• To supply the heart muscle with oxygen

• To pump blood to the lungs

• To filter waste from the blood

• To regulate heart rhythm

What is the typical range of heartbeats per minute generated by the heart's electrical conduction system at rest?

• 30-50 beats/minute

• 60-100 beats/minute

• 100-140 beats/minute

• 140-180 beats/minute

Which chamber pumps blood to the lungs?

• Right ventricle

• Left atrium

• Left ventricle

• Right atrium

Which of the following correctly describes the sequence of electrical conduction through the heart?

• SA node → AV node → Bundle of His → Bundle branches → Purkinje fibers

• AV node → SA node → Bundle of His → Purkinje fibers → Bundle branches

• Bundle of His → SA node → AV node → Purkinje fibers → Bundle branches

• Purkinje fibers → Bundle branches → AV node → SA node → Bundle of His

Which blood vessel brings deoxygenated blood from the body into the right atrium of the heart?

• Pulmonary vein

• Aorta

• Superior/inferior vena cava

• Pulmonary artery